effect (n.) a change which is a result or consequence of an action or other cause

A shared vision of focused, research-driven goals 

We teach proven, evidence-based skills that capitalize on client strengths and bolster areas of difficulties. We leverage peer-reviewed research to help clients achieve their goals. 


Dr. Alissa Ellis

Dr. Alissa Ellis is the founder and director of Ellis Effect psychological group. She is a clinical neuropsychologist with expertise in psychodiagnostics and treatment for children, adolescents and adults with mood disorders, anxiety disorders, and ADHD. She offers a unique and empirically supported perspective to develop individualized treatment plans tailored to the client and the family.


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The Ellis Effect psychological group has affiliations with the University of California Los Angeles.
The Ellis Effect psychological group has affiliations with the Association for Behavioral and Cognitive Therapies.
The Ellis Effect psychological group has affiliations with The International Neuropsychological Society.
The Ellis Effect psychological group has affiliations with the National Institute of Mental Health.

Effective, Experienced, Evidence-based

Simple, understandable, quality interventions tailored specifically to your needs.

Psychological Treatments

A cognitive-behavioral approach to treatment for mood, anxiety, attention, and trauma/stress disorders.


Psychiatric Services

Medication consultation and management provided by a psychiatrist who is board certified in child, adolescent, and adult psychiatry.

Psychiatric Services

Psychodiagnostic Assessment

Thorough assessment of current psychological difficulties using standardized instruments, record review, and client interviews.

Psychodiagnostic Assessment


Consultation to clarify diagnosis, aid treatment planning, and develop a roadmap for future action​.


thinkSMART® and Executive Function Coaching

One-on-one coaching to improve areas of executive functioning through our thinkSMART@home program or our thinkSMART® Jr. Program.

Executive Function Coaching

Neuropsychological Assessment

For more information, please visit Neurobehavior Services or contact admin@neurobehaviorservices.com. Neuropsychological services are only provided in Pasadena.

Neuropsychological Assessment

Group Interventions

Empirically supported group intervention for teens, adults, and parents in areas of emotion regulation, executive functioning, perinatal anxiety, and parenting.

Group Interventions


The thinkSMART® Program, conducted at UCLA, is a group-based intervention targeting executive functioning in teens.  This educational training program teaches use of concrete behavioral strategies to individuals with weaknesses in areas of organization, time management, task initiation/completion and planning.  

Quality research with applicable results

Through cutting-edge and novel experimental methods, the Ellis Effect team is actively involved in ongoing research aimed to (1) better understand psychological and social processes contributing to distress & wellness, (2) enhance existing psychological interventions, and (3) develop novel therapeutic approaches.

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